As I thought this, I meandered between the bookshelves.
There were indeed many books of different kinds.
Though the majority of the books were in Human language, there were those that were also written in Beast God language or Demon God language.
There was a book in Fighting God language as well. I am not knowledgeable if there are some in Heaven God language or Sea God language languages though.
I would need to transliterate the letters of those languages to one I know already, before I could even begin reading it.